RE: Altering Freelist Groups in 10gR2 when moving to RAC from NON-RAC?

From: "VIVEK_SHARMA" <VIVEK_SHARMA@xxxxxxxxxxx>

To: <oracle-l@xxxxxxxxxxxxx>

Date: Wed, 27 Sep 2006 18:16:53 +0530

Jonathan, Folks
Qs Does conversion of freelist groups to 4 needs to be done ONLY for
Tables which undergo INSERTs & NOT for Tables which undergo UPDATEs,
SELECTs, DELETEs?
NOTE Our Database Size is Huge i.e. 3 TB.
Qs Any Other parameter that should also be changed when moving a NON-RAC
Database to RAC?
Thanks indeed for responding
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Jonathan Lewis
Sent: Wednesday, September 27, 2006 3:17 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Altering Freelist Groups in 10gR2 ?
The only option is to do the CTAS, as the freelist group
blocks are located immediately after the segment header
block in the first extent.
The only other option to consider is 'alter table move' to
move the table into a tablespace defined to use ASSM
and forget about freelist groups - but I'm not very keen
on ASSM for high-performance, high-concurrency systems
myself.
Regards
Jonathan Lewis
----- Original Message -----
From: "VIVEK_SHARMA" <VIVEK_SHARMA@xxxxxxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
Sent: Wednesday, September 27, 2006 10:42 AM
Subject: Altering Freelist Groups in 10gR2 ?
Folks
When converting a NON-RAC Database to RAC in 10.2, the freelist groups
need to be altered to 4(= to the Number of RAC Nodes)
How is the freelist groups to be altered?
Seek to avoid usage of the CTAS command i.e. "Create Table <Duplicate
Tbl Name with freelist groups 4> As Select * from Original Table" since
this is very tedious
Is there any performance issue/Others with using the alter approach
versus the CTAS approach?
Thanks indeed
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